Cooling unit



June 2, 19 36. I M. R. KARGE 2,043,176

COOLING UNIT F ile d A r-11 16, 1952 5 Sheets-Sheet 1 INVENTOR Y NAxh/Ey. KAARE June 2,1936.

1 M. R. KARGE COOLING UNIT Filed April 16, 1952 5 $heets-Sheet 2 mu m M. R. KARGE' COOLING UNIT June 2, 1936.

Filed April 1.6, 1932 5 Sheets-$heet 5 INVENTOR BY/ AXk/ELL 7T. KARefi ATTO EY" 40 in my prior application Patented June 2, 1936 UNITED STATES PATENT OFFICE COOLING UNIT Maxwell R. Karge, Brockport, N. Y. Application April l6, 1932, Serial No. 605,683

7 Claims.

This invention relates to cooling units made up of combined 1 and occupies but a minimum amount of space.

of the refrigerating unit with a combined oil reservoir and oil gauge.

'Another object of this invention'is to so construct the mounting. of the compressor of the reily apparent from the detailed description of the invention which follows, reference being had to the accompanying drawings in which Figure 1 is a front elevation of a combined refrigerating unit and milk cooling apparatus.

Figure 2 is a front elevation and partial section of a combined refrigerating unit and cooling apparatus of the immersion type. r Figure 3 is a front elevation of a modified form of the refrigerating unit and cooling apparatus.

30 Figure 4 is a front elevation of the compressor and its novel form of ta V V Figure 5 is a detail view of the crank case of the compressor and its combined oil gauge and oil reservoir.

5 In, the several figures of the drawings like reference numerals indicate like parts.

The cooling units forming the subject matter of my present invention include modified forms of the refrigerating unit illustrated and described Serial No. 591,550. This refrigerating unit is especially adapted for use with the cooling units in that it is simple and compact in construction and utilizes one. of its members as the support for the unit and the motor drive thereof. As illustrated in Figure 1, the

compressor I is provided with the cross shaped crank case 2, into the bottom'of which; is fastened the condenser 3. This condenser has a suitable floor plate at the bottom of it with which the condenser is anchored to the base of the cooler to support the compressor thereon. The

which is adjustably' mounted on the condenser and drives the compressor bywmeans of the belt 5 drive I.

Supported in the side of the cross shaped crank case 2 of the compressor and horizontally projecting from it is the evaporator 8. This evaporator extends into the cooling cabinet 9 and has the cooling fins I0, I0 mounted thereon within the cabinet. On the exposed portion of the evaporator between the compressor and the cooling cabinet are provided a pair of collars II and I2 which are tom thereof. The cooling water enters the radiator thru the inlet I 4 and leaves it thru the outlet I5 after it has absorbed some of the heat of the milk which has passed over the aerator.

Above the radiator is mounted a trough I6 in the bottom of which are provided suitable openings from which the milk is fed onto the aerator. The milk-is fed into the trough from atank I1 supported above the aerator and its flow into the trough is regulated by the faucet I8.

Below the evaporator 8 and in line with the aerator I3 is located another trough I9 which is suitably suspended from the evaporator on the outside of the collars II and I2 to catch the milk as it leaves the evaporator. This second trough I9 has a single outlet 20 in the middle of the bottom of it thru which the milk passes into the milk can 2| placed below the trough I9. In this way the milk from the tank I1 is first allowed to flow over the aerator for a preliminary cooling by the cooling water circulating in the aerator. The milk thus cooled is then allowed to flow onto and around the periphery of the evaporator 8 between the collars II and I2 to have this evaporator absorb more heat from the milk and provide a second pre-cooling for it before it enters the milk can 2| thru the trough I9 and its outlet 20. g

The milk thus cooled and filled into the can is then placed in the can into the cooling cabinet 9 where the milk is finally brought to the desired low temperature by the absorption of more of its heat by the evaporator thru the cooling fins I0, III.

,A door 22 is provided at one end of the coolable cooling tank 25 in which is contained a liquid cooling medium such as a brine solution or water. The refrigerating unit for this cooling unit is made up of the compressor 25, the horizontal condenser 21 and the evaporator 28. In this unit the horizontally arranged condenser 21 furnishes the support for the unit which, for this purpose, is provided with suitable legs or standards 29 and 38 by which the condenser is supported and anchored on top of the cooling tank 25. In place of having the condenser anchored in the side of the crank case of the compressor, its condensing water pipe 3|, which extends from one end of the condenser to the other, is welded into the side of the evaporator tube to provide the mechanical connection between the condenser and the compressor 26 and surge drum 32 forming part of the evaporator 28. This method of mechanically joining the condenser to the evaporator serves to simplify the pipe connection between the water pipe 31 of the condenser and the water jacket of the compressor formed by the pipe and also serves to simplify the connection between the compressor and the condenser formed by the pipe 34, and the connection between the condenser and the evaporator formed by the pipe connection 35. The cooling water enters the condensing water pipe 3| thru the inlet 36 at the outer end of the condenser 21.

The evaporator is the crank case of connected to the bottom of the compressor 26 and the surge tank section of it extends vertically into the inside of the cooling tank 25 where it has the evaporator proper extending horizontally therefrom and has the cooling fins 38, 38 mounted thereon. The evaporator and its cooling fins absorb the heat from the cooling medium in the cooling tank and thus indirectly cool the milk cans 39 and their contents while they are partially submerged in the cooling tank as illustrated in Figure 2.

The cooling unit illustrated in Figure 3 is provided with practically the same form of cooling unit illustrated in Figure 2 except that in place of an evaporator a reservoir or liquid receiver 40 is mounted into the bottom of the crank case 4! of the compressor 42 to suitably support the compressor and one end of the condenser 43. The outer end of the condenser is supported by a standard or leg 44 and both the surge tank 40 and the standard 44 are provided with a suitable floor plate with which they are anchored to the floor or other supporting surface.

The evaporator for this unit comprises a suitable coil system 45 which is connected at one end with the reservoir or liquid receiver 40 near the bottom of it and with the intake of the compressor 42 with the other end.

In Figure 4 I have illustrated the compressor 46 in combination with a novel form of storage tank which is made up of a vertical manifold 41 which is mounted into the bottom of the crank case 48 of the compressor and is provided with a floor plate 48 with which it is anchored to the floor to-support the compressor and its driving motor thereon. From the manifold 41 branches off one or more tubular tanks 58 in which the compressed air is stored therein. To increase the capacity of the storage tank it is therefore only necessary to add more tubular tanks 58 to the manifold 4'! and let them project radially in any desired direction from it. If the tubular tanks are connected to the manifold parallel to each other, very little space will be occupied by them so that the whole unit can be compactly mounted in a minimum space.

In Figure 5 I have illustrated a novel form of oil reservoir used in connection with my compressors in which the crank case has the shape of a cross member. This reservoir comprises a tubular extension 5| which is threaded into the side of the crank case 52 in line with the crank shaft which is mounted in the opposite side of the crank case. The tubular extensions may be made any length to store sufiicient lubricating oil for the continued or intermittent operation of the crank 53 over a long period. The outer end of the reservior is closed by a gauge glass 54 thru which the level of the oil within the reservoir may be observed at all times.

I claim:

1. A cooling unit for cooling liquids comprising a refrigerating unit, a cooling compartment, a

tubular evaporator projecting from said refrigerating unit into said cooling compartment with a section of said tubular evaporator exposed between said refrigerating unit and means for directing a continuous flow of the liquid to be cooled into and out of thermal contact with the exposed portion of the evaporator for precooling.

2. A cooling unit for cooling liquids comprising a refrigerating unit including a tubular evaporator, a cooling compartment, said evaporator being partially mounted within without said cooling compartment, means for directing a continuous flow of the liquid to be cooled into and out of thermal contact with the exposed portion of the evaporator, a vessel for I collecting the liquid pro-cooled by said evapo- B,

being adapted to be mounted within said cooling compartment to be additionally cooled with its liquid contents by the evaporator section located with said cooling compartment.

3. A cooling unit for cooling liquids comprising a refrigerating unit including an evaporator, a cooling compartment mounted in spaced relation to said refrigerating unit, said evaporator extending from said refrigerating unit into said cooling compartment, a water cooling apparatus suspended above the evaporator between said refrigerator unit and said cooling compartment to have the liquid to be cooled pass over said water cooling apparatus onto and around said evaporator, a vessel for collecting the pre-cooled liquid below said evaporator, said vessel being adapted to be mounted in said cooling compartment to additionally cool the liquid contained therein by the remainder of said evaporator.

4. A cooling unit for cooling liquids comprising a refrigerating unit having a single tubular evaporator, a cooling compartment, means for directing a stream of the liquid into thermal contact with a portion of said evaporator and means for collecting and storing the pre-cooled liquid in the cooling compartment for cooling by the remainder of said evaporator.

5. A liquid cooler for precooling and final cooling of liquids, a cooling compartment, a tubular evaporator projecting into said cooling compartment with a portion of it located on the outside of the compartment and means for directing a continuous flow of the liquid into and out of termal contact with the evaporator on the outside of said cooling compartment.

6. A liquid cooler for precooling and final cooling of liquids, a cooling compartment, a tubular evaporator projecting into said cooling compartrator, said vesssel and partially liquid into and out of thermal contact with said evaporator.

7. A liquid cooler as set forth in claim 6 with means associated with said evaporator for collecting the precooled liquid after leaving said evapo- 3' rator.

' MAXWELL R. KARGE. 

